Covered elastic thread or cord



May 3 1927.

if; iii i 1,627,255 J. AB. sMlTl-l COVERED ELECTRIC THREAD OR CORD Filed Oct. l. 1926 Patented May 3, 1927.

UNITED STATES PATENT OFFICE.

JULIUS B. SMITH, F WATERBURY, CONNECTICUT, ASSIGNOR TO-THE AMERICAN MILLS C0., OF WATERBURY", CONNECTICUT, A CORPORATION.

COVERED ELASTIC THREAD 0R CORD.I

Application led October 1, 1926. Serial No. 138,883.

This invention relates to-improvement in covered elastic thread or cord of the type commonly employed in the make-up of elastic fabric such as is used in corsets, girdles,

` etc., wherein the elastic fabric is sewed 1n place. Ihe operation of sewing often severe or weakens the elastic core of the thread or cord so that when the' elastic fabric is placed under tension, the core of the elastic thread creeps With respect to its covering and causes unsightl puckers to appear.

'lhe o ject of this invention is to produce a covered elastic thread orcord which shall be proof against the substantial creeping of l5 its elastic core with respect to its covering,

should the former become weakened or severed for any reason.

l/Vith this object in view, my invention consists in a covered elastic thread or cord characterized by a fibrous covering secured to its elastic core by means of an elastic adhesive.

In the accompanying drawings:

Fig. 1 is a face view of a section of the elastic core of my improved covered elastic thread;

Fig. 2 is a corresponding view after lthe application of the inner cover, the core belng shown under slight tension;

Fig. 3 is a transverse section thereof on the line---3 of Fig. 2;

Fig. 4 is a view corresponding to Fig. 2 but showing the same coated with an elastic adhesive; Fig. 5 is a transverse sectional view on the line 5-5 of Fig. 4;

Fig. 6 is a` view corresponding to Figs. 2

and 4 but showing the same after the application of the outer covering to produce the completed thread;

Fig. 7 is a transverse sectional View on the line 7 7 of FigrG; and

Fig. 8 :is a view of the completed thread corresponding to Fig. 6, but showing the same relieved' of tension.

In carrying 'out my invention, as herein shown, I employ an elastic core-member 1() of rubber or equivalent material, to which I vapply an inner covering l1 composed of a helically-disposed group of four fibrous threads simultaneously Wrapped around it, as shown in Figs. 2 and 3. The next step in the production of my improved elastic thread or cord consists in binding the core.

and inner covering together by means of an elastic adhesive, such aslatex, or a suitable rubber' solution, which is indicated by stippling in Figs. 4 to 8 inclusive. i

The adhesive may be applied in a variety of Ways, such, for instance, as by iinmersing the partlycompleted thread or cord shown in Fig. 3 in a bath of liquid adhesive and subsequently drying the same to the desired degree.

For the purpose of protecting the adhered inner covering 11 and providing an attractive finish for the completed elastic thread or cord, I superimpose upon the said cover# in 1l an outer covering 12,-consisti'ng of a iielically-disposed group of three fibrous threads simultaneously wrapped overit and preferably reversely inclined with respect thereto, as shown in Figs. 6 and 8.

Preferably, the outer coverin l2 is ape plied to the inner covering ll before the adhesive of the latter has completely dried, so that the outer covering will be more or less bonded in place. sirable,.is not essential to my invention.

As shown and described, the inner covering 11 consists of a group of four threads, and the outer covering consists of a group of three threads, though the number of threads employed in either covering may be varied to meet particular requirements Without departing from my invention.

By employing an elastic adhesive as described, the completed thread or cord may be stretched without destroying ...the bond between the inner covering and the core, and, furthermore, it has been discovered that the adhesive and inner covering serve to prevent the oxidation of the elastic core and thus lengthens its life.

I claim:

1. A covered elastic thread or cord, comprising an elastic core, a'fibrous inner covering enveloping the said core, an elastic adhesive for bonding the said core and said fibrous inner covering together, and an outer This feature, While de` or finishing brous covering enveloping both .the said core and the inner fibrous covering.

2. A covered elastic thread or cord, com- 5 prising an elastic core, a fibrous inner covering helically wrapped around the said core, an elastic adhesive for bonding the sald core and thesald fibrous nmer covering together, and an outer or finishing fibrous covering helically wrapped over the said 10 inner fibrous covering in a direction reverse to the helical inclination of the said inner ibrous covering.

In testimony whereof, I have signed this speciiication.

JULIUS B. SMITH. 

